| Hans Diderik de Brinck-Seidelin | |
| Birth Date: | 1720 8, df=yes |
| Birth Place: | Copenhagen, Denmark |
| Death Place: | Copenhagen, Denmark |
| Nationality: | Danish |
| Occupation: | Supreme court justice and landowner |
Hans Diderik de Brinck-Seidelin (1 August 1720 - 5 March 1778) was a Danish Supreme Court justice and landowner who was raised to the peerage under the name Brinck-Seidelin in 1753. He owned the estates Hagestedgård (1748-1769), Holbæk Ladegård (1748-1778) and Eriksholm (1762-1778).
He was born on 1 August in Copenhagen, the son of the Royal confessor (Danish: kongelig confessionarius[1]) Iver Brinck (1665-1728) and Sophie Seidelin (1693-1741). His maternal grandfather was Post Master-General Hans Seidelin.
Brinck-Seidelin's maternal uncle, Hans Hansen Seidelin, had no male heirs. He therefore endowed the estates Hagestedgård and Holbæk Ladegård to Hans Diedrik Brinck-Seidelin with the intention that they be turned into a Danish: stamhus (entailed estate or family trust) for future generations of the Seidelin family. Brinck-Seidelin purchased Eriksholm and established Stamhuset Hagested from his now three estates in 1752. He was at the same time ennobled under the name de Brinck-Seidelin. Hagestedgård was, however, with royal approbation, sold to Carl Adolph von Castenschiold in 1769.[2]
On 25 May 1746 in Horsens, Brinck-Seidelin married to Ingeborg Pedersdatter Bering (17271796). They had nine children: